增加 LocalDateTime、LocalDate 2 Date 互转工具类

hutool-core/src/main/java/cn/hutool/core/date/DateUtils8Transform.java

@@ -0,0 +1,95 @@
+package cn.hutool.core.date;
+
+import java.time.*;
+import java.util.Date;
+
+/**
+ * LocalDate和Date的互换
+ * <p>
+ * java.sql.Date、java.sql.Timestamp、java.util.Date这些类都不好用，很多方法都过时了。
+ * Java8里面新出来了一些API，LocalDate、LocalTime、LocalDateTime 非常好用
+ * 如果想要在JDBC中，使用Java8的日期LocalDate、LocalDateTime，则必须要求数据库驱动的版本不能低于4.2
+ *
+ * @author dazer
+ * @date 2018/2/8 下午2:31
+ * @see DateUtil
+ */
+public class DateUtils8Transform {
+
+	private DateUtils8Transform() {
+	}
+
+	/**
+	 * 01. java.util.Date --> java.time.LocalDateTime
+	 */
+	public static LocalDateTime date2Java8DateTime(Date date) {
+		Instant instant = date.toInstant();
+		ZoneId zone = ZoneId.systemDefault();
+		return LocalDateTime.ofInstant(instant, zone);
+	}
+
+	/**
+	 * 02. java.util.Date --> java.time.LocalDate
+	 */
+	public static LocalDate date2Java8Date(Date date) {
+		Instant instant = date.toInstant();
+		ZoneId zone = ZoneId.systemDefault();
+		LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, zone);
+		return localDateTime.toLocalDate();
+	}
+
+	/**
+	 * 03. java.util.Date --> java.time.LocalTime
+	 */
+	public static LocalTime date2Java8Time(Date date) {
+		Instant instant = date.toInstant();
+		ZoneId zone = ZoneId.systemDefault();
+		LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, zone);
+		return localDateTime.toLocalTime();
+	}
+
+
+	/**
+	 * 04. java.time.LocalDateTime --> java.util.Date
+	 */
+	public static Date java8Date2Date(LocalDateTime localDateTime) {
+		ZoneId zone = ZoneId.systemDefault();
+		Instant instant = localDateTime.atZone(zone).toInstant();
+		return Date.from(instant);
+	}
+
+
+	/**
+	 * 05. java.time.LocalDate --> java.util.Date
+	 */
+	public static Date java8Date2Date(LocalDate localDate) {
+		ZoneId zone = ZoneId.systemDefault();
+		Instant instant = localDate.atStartOfDay().atZone(zone).toInstant();
+		return Date.from(instant);
+	}
+
+	/**
+	 * 06. java.time.LocalTime --> java.util.Date
+	 */
+	public static Date java8Date2Date(LocalTime localTime) {
+		LocalDate localDate = LocalDate.now();
+		LocalDateTime localDateTime = LocalDateTime.of(localDate, localTime);
+		ZoneId zone = ZoneId.systemDefault();
+		Instant instant = localDateTime.atZone(zone).toInstant();
+		return Date.from(instant);
+	}
+
+	/**
+	 * java.sql.Date与java.util.Date的转化
+	 *
+	 * @param sqlDate
+	 * @return
+	 */
+	public static Date sqlDate2Date(java.sql.Date sqlDate) {
+		return new Date(sqlDate.getTime());
+	}
+
+	public static Date date2SqlDate(Date date) {
+		return new java.sql.Date(new Date().getTime());
+	}
+}